Malaysia is one of the Rubber exporter country.
Rubber tapping is the process by which rubber is gathered. An incision is made in the bark of a rubber tree, which cuts through the latex vessels that flow between the bark and the cambium. The latex then drips into a vessel.
Each night a rubber tapper must remove a thin layer of bark along a downward half spiral on the tree trunk. If done carefully and with skill, this tapping panel will yield latex (white liquid) for up to 5 years. Then the opposite side will be tapped allowing this side to heal over. The spiral allows the latex to run down to a collecting cup. The work is done at night so the latex will drip longer before coagulating and sealing the cut.The collection of latex is carried out before sunrise in order to prevent the latex become harden (high temperature).
Depending on the final product, additional chemicals can be added to the latex cup in order to preserve the latex for longer. Ammonia solution helps prevent natural coagulation and allows the latex to remain in its liquid state. This form of latex is used as the raw material for latex concentrate, which is used for dipped rubber products or for the manufacture of Ribbed Smoke Sheet grades.* Some information abstract from Wikipedia